ZA-8 vs. ZA-12
Both ZA-8 and ZA-12 are zinc alloys. They have a very high 97% of their average alloy composition in common.
For each property being compared, the top bar is ZA-8 and the bottom bar is ZA-12.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 87 to 100 | |
| 89 to 100 |
| Compressive (Crushing) Strength, MPa | 210 to 250 | |
| 230 to 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 85 to 86 | |
| 83 |
| Elongation at Break, % | 1.3 to 8.0 | |
| 1.6 to 5.3 |
| Fatigue Strength, MPa | 51 to 100 | |
| 73 to 120 |
| Fracture Toughness, MPa-m1/2 | 13 | |
| 14 to 15 |
| Knoop Hardness | 110 to 130 | |
| 110 to 130 |
| Poisson's Ratio | 0.26 | |
| 0.26 |
| Rockwell B Hardness | 54 to 65 | |
| 56 to 63 |
| Shear Modulus, GPa | 34 | |
| 33 |
| Shear Strength, MPa | 240 to 280 | |
| 240 to 300 |
| Tensile Strength: Ultimate (UTS), MPa | 210 to 370 | |
| 260 to 400 |
| Tensile Strength: Yield (Proof), MPa | 210 to 290 | |
| 210 to 320 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 120 |
| Maximum Temperature: Mechanical, °C | 100 | |
| 100 |
| Melting Completion (Liquidus), °C | 400 | |
| 430 |
| Melting Onset (Solidus), °C | 380 | |
| 380 |
| Solidification (Pattern Maker's) Shrinkage, % | 1.1 | |
| 1.3 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 450 |
| Thermal Conductivity, W/m-K | 120 | |
| 120 |
| Thermal Expansion, µm/m-K | 23 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 40 | |
| 42 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 11 |
| Density, g/cm3 | 6.3 | |
| 6.0 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 3.4 |
| Embodied Energy, MJ/kg | 62 | |
| 64 |
| Embodied Water, L/kg | 420 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.8 to 28 | |
| 4.0 to 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 490 | |
| 260 to 620 |
| Stiffness to Weight: Axial, points | 7.5 | |
| 7.6 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 9.3 to 17 | |
| 12 to 19 |
| Strength to Weight: Bending, points | 12 to 18 | |
| 15 to 20 |
| Thermal Diffusivity, mm2/s | 42 | |
| 43 |
| Thermal Shock Resistance, points | 7.6 to 13 | |
| 9.4 to 14 |
Alloy Composition
| Aluminum (Al), % | 8.0 to 8.8 | |
| 10.5 to 11.5 |
| Cadmium (Cd), % | 0 to 0.0060 | |
| 0 to 0.0060 |
| Copper (Cu), % | 0.8 to 1.3 | |
| 0.5 to 1.2 |
| Iron (Fe), % | 0 to 0.075 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 to 0.0060 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0.015 to 0.030 | |
| 0.015 to 0.030 |
| Nickel (Ni), % | 0 to 0.020 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.045 | |
| 0 to 0.060 |
| Tin (Sn), % | 0 to 0.0030 | |
| 0 to 0.0030 |
| Zinc (Zn), % | 89.7 to 91.2 | |
| 87.1 to 89 |